Direct Aerosol Forcing of Climate: Tests of the Internal Consistency of Aerosol Characterizaion Data

9320871 Charlson这一研究项目正在开发一种方法，用于现场测量具有气候重要性的光学特性，然后将其应用于具有区域代表性的地点，以便为全球气候模型提供相关参数。我们的目标是通过密集的观察性活动来表征测量的不确定性，并研究测量参数的变化来源。气溶胶光学性质将通过气溶胶尺寸分布和尺寸分辨化学的测量直接测量并由Mie理论预测。这两种方法的融合需要验证目前对气溶胶光学的理解，并评估MIE计算所需的各种简化假设的准确性。四项具体任务是量化和减少对流层气溶胶光学性质目前存在的不确定性；(1)制定一种测量和数据分析方法，(2)展示在一个特征良好、污染最小的海洋站点(切卡峰)的扩展测量集的关闭情况，(3)在不同的代表性站点(清洁和受污染的海洋、清洁和受污染的大陆)展示关闭情况，以及(4)向测量和模型界提供气溶胶光学参数。

9320871 Charlson This research project is developing a methodology for in situ measurements of the climatically important optical concerned with properties which can then be applied to regionally representative sites in order to provide relevant parameters for global climate models. Our goals to characterize measurement uncertainties and to study the sources of variation in the measured parameters by intensive, observational campaigns. Aerosol optical properties will be both measured directly and predicated by Mie theory form measurements of aerosol size distribution and size-resolved chemistry. Convergence of these two approaches is required to validate the present understanding of aerosol optics and assess the accuracy of various simplifying assumptions required by the Mie calculation. Four specific tasks will be to quantify and reduce the uncertainties that presently exist in the climatically important optical properties of tropospheric aerosols; (1) develop a measurement and data analysis methodology, (2) demonstrate closure of an extended measurement set at a well-characterized, minimally- polluted marine site (Cheeka Peak), (3) demonstrate closure at different representative sites (clean and polluted marine, clean and polluted continental), and (4) deliver aerosol optical parameters to measurement and modelling communities.